Sprayer



A. MADSEN Dec. 11, 1934.

SPRAYER Filed OCT.. 3l, 1952 INVENTw: MMM/77W ym/MM ATToJYE'z:

Patented Dec. 11, 1934 1,983,627

UNITED STATE-S PATENT OFFICE sPaAYER Andrew Madsen, Stillwater, Minn.

Applicationv ctober'31, 1932, Serial No. 640,489

' 2 claims. (C1. 299-89) My invention relates to improvements in spray- It is well known,.in the use of this type of ers of the class used for spraying foliage or eX- sprayer, they must be shaken considerably to terminating bugs, eas and other kinds of inkeep the contents of the reservoir at all times sects. thoroughly mixed and prevent settling of powders The main object of this invention is to-promixed with the liquid. In doing this the liquid vide a continuous or uniformly atomized exhaust splashes around within the reservoir usually. in from Asuch sprayers by means of certain cona plane longitudinal of the device and in curvastruction of nozzles and feed means thereto and tures represented by arrows 16 (Fig. 1). For this ashereinafter fully set forth, reference being had reason the holes or vents are at right angles 10 to the accompanying drawing, in which, to said splashing movement of the liquid to pre- 10 Fig. 1 is a longitudinal sectional elevation of a Vent entry of any appreciable amount of such hand operated sprayer of well known typeA and liquid into tube 11 above the normal liquid level. embodying my improvements. Now it is obvious that liquid 13 is completely in' Fig. 2 is an enlarged'sectional view as on line closed. y V (n l l5 2 2 in Fig. 1 showing my nozzle means and liquid The nozzle end of the sprayer, designated N l5 feed means thereto more fully, and the tapered as a whole in Figs. 1 and 2, is concentric with forward part of the sprayer indicated in dotted the forward end of the tapered part 5T of the lines only. main cylinder and located forward of the upper Figs. 3 and 4 are respectively cross sectional deend of the tube 11. 17 is a metal tube xed in the tail views at lines 3-3 and 4 4 of Fig. 1, showing forward end part 5T and projecting forward 20 certain details of a diametrically mounted tube thereof the projecting part preferably provided 11 in the reservoir 10 of the sprayer and comwith (male) threads 17T (see Fig. 2). prising an important feature of my invention. Within tube 17 is retained concentrically a Referring to the drawing by reference numerliquid feed tube 18 projecting slightly forward als, I have illustrated my improvements as emof the tube 17, said tube 18 extending rearwardly 25 bodied in one of the well known type of hand and inwardly to the upper open end of the resoperated sprayers comprising an elongated cylinervoir tube 11, thence extending downwardly der 5 tapered as 5T to its forward end. 6 iS a within the latter tube, being preferably xed to transverse wall at the junction of the straight the rear inner wall of the latter, and terminatand tapered parts and in which is provided any ing with its lower end about centrally within tube 30 suitable type of check valve 7. 8 is the usual 11 and spaced above the lower extremity of the DS'GOII reCiDIOCable in the main Cylinder by 11162115 latter. Said latter end of the liquid conductor of the piston rod 9 to provide air pressure to be tube is thus opening ini-.0 the liquid in tube 11 exhausted from the small or nozzle end. 10 is and when air pressure is aected in parc 5T a cylindrical or can-like liquid reservoir suitably the Compressed air forces the liquid in the tube 35 iixed to the under side of the tapered or nozzle through tube 18 to the nozzle where it mixes end 5T 0f the SDI'ayBl- COmmU-'flaton iS PTO- with compressed air passing forwardly between vided between the interior of the nozzle and the the tubes 17 and 13 When the piston is retractnteol 0f the reservoir only in the Open upper ed some compressed air remains in part 5T which 40 end 0f a' Central flxed upright tube 11 extending air pressure continues to be expelled at the nozdiametrically across the reservoir and its bottom Zle and also continues Spray action of liquid as end Clqsed or xeq to the Inner surface of the described. Assuming that the sprayer piston is reslmeliganatls ,Fqguaiity 0f praying 1i qui d in reciprocated with fair speed and frequency it will the reservoir and in which the tube 11 is of course .06 rnadny understood tha each forward Stoke immersed. 14 are a number of seepage holes in 1s going lm to effect before he conpresslon@ Ove the lower part of tube 11 and through which descr1bed1s exhausted, thus providing continuous liquid may enter the tube until it reaches its and-umf0-rm Sway from the nozzle' The pocket normal level. l5 are a pair of diametrically op- 20 1S adlusta'b1-e m S129 accordllg to how far the nozzle cap 1s threaded on, bringing the out- 50 posite vents in tube 11 near its upper end and within the reservoir, said vents in transverse le@ 19A 0f Sald Cap G0 deSlI'ed SpaCed 11212361011 t0 alinement relative to the longitudinal center line tube 18 and thereby regulating the liquid and or direction of the compression cylinder 5 for air SD-Iay '60 any desired COIld'GOIlreasons presently to be set forth. 10F (Fig. 2) is 21 S 9 100k 111117 threaded 0n JGU10@ 17 inwardly the usual filler cap for the reservoir. of the nozzle member or cap 19 and 22 is a suit- 55 able Washer between said twoparts, to provide a leak-proof mounting of said nozzle parts.

In the use of my device it will be readily understood that when compressed air is generated within part 5T, some of it passes forwardly into the nozzle between the tubes 17 and 18 and some into the reservoir through the apertures 15 and pressing liquid into the tube 11 through the apertures 14 and thence into tube 18 to the nozzle. Continuous or intermittent shaking of the sprayer as usually occurs during its use does not affect the spraying action. The intake end of tube 18 is submerged in a relatively constant and undisturbed quantity of the liquid within the tube 11. 'I'he splashed main body of the liquid churns about within the reservoir 10 and does not have direct outlet to part 5T. Thus it is not possible for irregular feeding of liquid tothe nozzle at any time with consequent irregularity of emitted spray. In other words my liquid tube intake within tube 11 in an area undisturbed by splashing, provides for constant liquid spray at the nozzle, and too rapid or irregular spray is eliminated.

In the construction of my device various modications may be made in structure and proportions of parts. In tube 11 the apertures 14 are small and provided in any suitable number and the apertures 15 may be relatively large and preferably only two in number as stated. The lower end of tube 18 is located close to the bottom end of tube 11 mainly to insure drawing olf of practically all of the liquid contents.

I claim:

1. In a sprayer comprising an air pressure producing chamber and an air outlet nozzle communicating with said chamber, a liquid reservoir fixed to said outlet nozzle, said nozzle comprising a forwardly tapered chamber, a sprayer tube extending rigidly forward from said tapered chamber, a cap adjustable longitudinally on the front end part of said tube and provided with an outlet concentric of said tube; a fixed upright tube in said reservoir having its upper end in communication with the tapered chamber and the lower end of said tube closed at the bottom of the reservoir, the walls of said tube provided with a number of apertures in proximity to the lower end, a liquid conveyor tube fixed within said upright tube with its lower end opening into the lower central part of said tube, the upper part of said conveyor tube extending concentrically of and'longitudinally through the rst described sp-rayer tube and its forward end directed toward the outlet of the cap member but spaced inwardly of the latter,

2. The structure specified in claim 1 in which said upright tube in the reservoir is provided with a pair of comparatively large vent apertures in its upper part above the liquid level in the reservoir and in proximity to the tapered nozzle to provide passage means for air from the tapered nozzle into the reservoir above the liquid level, said pair of apertures being diametrically opposite each other on a diametrical line transversely of the direction of the tapered nozzle for the purpose set forth.

ANDREW MADSEN. 

